1. Balgrist University Hospital, University of Zürich, Zürich, Switzerland
2. Musculoskeletal Research Unit, Center for Applied Biotechnology and Molecular Medicine, Equine Department, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
3. Institute of Anatomy, University of Bern, Bern, Switzerland
4. Synthes GmbH, Langendorf, Switzerland